Question

What is the purpose of using a Forensic Alternative Light Source?

A.To help take a better picture of a visible print
B.To fluoresce prints
C.To visualize latent prints on white backgrounds
D.To photograph a patent print

Answer 1

The purpose of using a Forensic Alternative Light Source is to visualize latent prints by inducing fluorescence in substances, thus enhancing contrast and revealing details that are not visible under normal lighting conditions.

Step-by-step explanation:

The purpose of using a Forensic Alternative Light Source (ALS) is to visualize latent prints, which may not be easily seen on various surfaces. The ALS can induce fluorescence in some substances, including fingerprints that may have traces of fluorescent materials or have been treated with fluorescent dyes. These dyes and phosphorescent materials transform nonvisible electromagnetic radiation into visible light, which is particularly useful in forensic science for revealing latent prints that would otherwise remain invisible. Ultraviolet light, commonly used in forensic ALS, can cause certain substances to fluoresce, enhancing the visualization of samples under investigation. Moreover, this technique can dramatically increase the contrast between the print and its background, which is essential for detailed analysis.